For children who have space to put them all, they are great because they can create a mini traffic education park and have fun for a long time. If there is not much space, someone might prefer the package with 5 instead of 10.
Their price is a bit high (they were bought for 50 euros) considering that they are made of plastic, not of any particular quality, and this is what played the most important role in my rating.
Finally, I should mention that even though it is evident from the photos that one language is Turkish and the other is English, this might be the reason why the signs are not exactly the same as ours (notice, for example, the yield sign which is white compared to the yellow one we have) and there are no other basic ones like the prohibition or the no right/left turn sign.